- Details
- Hits: 21755
Pictures of diagram and board layout. (click to enlarge). Please note that capacitors C626 and C628 are shown reversed, but that they are correctly mounted on the board !
Symptom :
After several years of operation, the TS850 sometimes is presenting an instability in the transmitter output power. Power varies and drops after a few minutes, comes up again and stays low...
Analysis :
There are several possible origin for this problem, we are treating here only the instability due to an ALC problem, which is the most common. Other reasons are treated elsewhere on this site.
The RF-UNIT unit is divided in several boards, one of these is smaller than the RF UNIT main board and supports the ALC function. This board is mounted verticaly and has the part number X59-1100-00. This board delivers an ALC voltage of -6.1V derived from the main +12.5V. This voltage converter is built with a astable multivibrator using 3 transistors, and a full-wave rectifier with the help of 2 diodes. Two capacitors C626 and C628 are filtering the ALC voltage. The Zener diode D605 limits the output voltage to -6.1V
If you have a minimum of technical knowledge, you can repair this ALC board.
Repair :
Start in measuring the ALC voltage which should be close -6.1V on pin 1. This voltage should stay stable in time and when using the TX. If it's not the case, it's time to heat the soldering iron !
Start in replacing the resistors R2 and R3 from 22kOhm to 18 kOhm. Very often this modification is enough, in particular when the transceiver is operated with a low supply (12V).If this does not help, all other components can be incriminated, but experience has shown that mostly the transistors, diodes and capacitors are faulty. These capacitors are not located on the ALC board but on the main board ! Even if you do not detect any problem with them, it is wise to replace them beacause they mostly finish to leak or dry...
- Details
- Hits: 27288
Updated 2023 jan. 27
A newer and mature version with more options has been published. An EXE file is available.
While setting up my remote station, I quickly have been confronted to the problem of the limitations of the remote ease of use. The first one is the ability to change the VFO frequencies. My logging software LOGGER32 offers a lot of macros and an option to use the mouse wheel to change the frequencies. But during daily traffic or contesting they quickly have shown their limitations.
On Twitter, I have seen that several hams have been using a small DJ controller for driving SDR receivers and transceivers. So I started thinking to do the same for the TS590s.
- Details
- Hits: 17971
I used the Cushcraft A3 et A4s yagis and soon or later, problems are appearing..
Here are the results of my investigations and repairing technic, that can be applied to other models and trades as well.
What is described here applies to a A4s triband antenna, but the reasoning can be made for any multi-band yagi or vertical.
- Details
- Hits: 40583
For my SOTA activities, i recently bought a QRP transceiver QRP SW-3B, which is a three-band QRP CW only for 40/30/20 m.
So, i needed an antenna that would allow to use these 3 bands in SOTA portable activity.
Already having some experience with the EFHW antenna, i decided to build one for 40/30/20m.
The main advantages of this EFHW antenna are :
- easy to build
- multiband
- needs only one support, can be installed in line, inverted V, zigzag.
- fed at its extremity, can be directed connected to the transceriver, without any coaxial cable.
- the radiating part is at the center
All these advantages are welcome for portable operations and make this antenna a perfect candidate for SOTA
- Details
- Hits: 10795
 |
Wishing to replace my good old trusty BIRD 43 Watt-meter, I prospected a little on the Internet and found the description of an open source project for a Watt-meter which corresponded perfectly to my needs. This is a fork of the version made by TF3LJ, and developed by PD0LEW. A new hardware version was subsequently developed by WA2T. I chose the version with an OLED display, but there are versions with touch-sensitive TFT displays. |
- Details
- Hits: 6167
 |
KISS (Keep It Simply Stupid) principle for the realization and parameter setting of this Winkey CW keyer using an Arduino Nano and the Keyer software by K3NG. |
- Details
- Hits: 5649
 |
The last QRA locator map no longer uses any API functions or Google maps. From now on, the Leaflet API and free basemaps are used. New features have been added, such as: - search by QRA locator on 6 or 8 characters. - search by address, location. - a tool for measuring distance and azimuth |
- Details
- Hits: 14914
Based on an idea received from Ron VK6KDD, here is the description of a cheap TCXO for your TS850 which improves stability a lot, within +/- 4 Hz. It can also be applied to any other rig using a reference crystal.
For about 12 €, you can find a precision crystal heater at Kuhne Electronics by DB6NT. This precision crystal heater provides temperature compensation for crystals, usually found within crystal oscillators. The assembled circuit, which is built on AL2O3 ceramic substrate, should be mounted against the thermostat crystal using heat shrink tubing. The circuit heats the crystal to a temperature of 40.8° C with an accuracy of better than 0.1° C. This provides high frequency stability over the temperature range of -5 to +40° C.
The use at 40°C permits to use standard Xtals, so no need to have a special Xtal. If your rig heats a lot or if you live in very hot countries, this addon will help you only if your rig stays under 40°C working temperature.
.
- Details
- Hits: 20921
Since the beginning, my brand new TS590s had a intermittent problem. The reception was fading and sometimes disappeared completely. Sometimes, the TX went away and at the same time, the HI/SHIFT setting didn't work above 3000 Hz.
I noticed that a slight shock on the case brought the rig back to live, but not always. Being new and under warranty, i sent the rig back for repair.
- Details
- Hits: 15227
This page is just a reminder for me, so i can find the commands i need from everywhere in the world... ;-) But it can be helpful ...
I've built a K3NG keyer with a small Arduino Pro mini board. I needed minimal functions :
- 3 memories
- a small speaker for the monitor.
- no speed pot.
- no USB interface.
- sleep mode after 1 minute.
- all settings are done in command mode with the paddles.
To be used in the field, the keyer is powered with a 3.7V battery. When in operating mode, the keyer consumes about 4mA, in sleep mode after 1 minutes : 0.1 uA ! No power switch is needed.
The author's Web page : https://blog.radioartisan.com/arduino-cw-keyer/
The software can be downloaded here : https://github.com/k3ng/k3ng_cw_keyer
The K3NG keyer Wiki is available here : https://github.com/k3ng/k3ng_cw_keyer/wiki/
SETTINGS
File Keyer_features_and_options (only this lines were uncommented)
#define FEATURE_COMMAND_BUTTONS
#define FEATURE_MEMORIES
#define FEATURE_SLEEP
#define OPTION_PROG_MEM_TRIM_TRAILING_SPACES
#define OPTION_DIT_PADDLE_NO_SEND_ON_MEM_RPT
#define FEATURE_COMMAND_MODE_ENHANCED_CMD_ACKNOWLEDGEMENT
File Keyer_settings (Changed only this line)
#define go_to_sleep_inactivity_time 1
#define analog_buttons_number_of_buttons 4
COMMAND MODE
Enter in command mode by pressing the command button
Exit command mode with X command or press the command button
MEMORIES
Px - program memory x (1 to 12), or press memory button after command button
Yxxxx - change memory repeat delay to xxxx ms
REPEAT press the memory button and keep it pressed then touch a paddle.
ERASE simply change memory but leave empty
SPEED
E - Announce speed
W - change speed with LEFT (plus) and RIGHT (minus) paddles.
M - change COMMAND mode speed
MONITOR
F - Change monitor frequency, use paddles for higher or lower frequency
O - toggle Monitor ( cycles through BOOP OFF, short BEEP ON, long BEEP ON only in paddle mode, not memories )
KEYER MODE
A - Switch to Iambic A mode
B - Switch to Iambic B mode
C - Switch to Single Paddle Mode
D - Switch to Ultimatic mode
G - Switch to Bug mode
T - Tune mode press RIGHT paddle for permanent Tune, LEFT paddle for intermittent Tune
KEYING SETTINGS
H - Set weighting and dah to dit ratio to defaults
I - TX enable / disable
J - Dah to dit ratio adjust
K - Toggle Dit and Dah Buffers on and off (Ultimatic Mode)
L - Adjust weighting
N - Toggle paddle reverse
Z - Autospace On/Off
STATUS
? sends status
1) Speed in WPM
2) Keyer Mode (A = Iambic A, B = Iambic B, G = Bug, S = Single Paddle, U = Ultimatic)
3) Weighting
4) Dah to Dit Ratio
Subcategories
Test equipements Article Count: 5
Antennas Article Count: 8
TS850 Article Count: 4
TS590 Article Count: 3
Cartes Article Count: 2
Radiosondes Article Count: 1
- Kazançlı bir başlangıç yapmak için deneme bonusu sunan bu siteye göz atabilirsiniz.
- Fırsatlarla dolu deneme bonusu veren siteler arasında öne çıkan bir seçenek burada.
- Yeni üyeler için özel bonus veren siteler, avantajlı teklifleriyle dikkat çekiyor.
- Kullanıcı memnuniyetine odaklanan bonus veren siteler, eşsiz fırsatlar sunuyor.
- Güvenilir bir deneyim için deneme bonusu veren siteler, kazanç kapınızı aralıyor.
- Hızlı kazanç fırsatı sağlayan deneme bonusu seçeneklerini keşfedin.
- Avantajlı teklifleriyle deneme bonusu veren siteler, yüksek kazanç imkanı sunuyor.